Apparatus for preparing casting molds



Dec. 9, 1930. B. L. M. VAN DER LANDE ET AL 1,734,714

APPARATUS FOR PREPARING CASTING MOLDS Filed March 26, 1928 2 Sheets-Sheet l Dec. 9, 1930. B. L. M. VAN DER LANDE ET AL 1,784,714

7 APPARATUS FOR PREPARING CASTING MOLDS Filed March 26, 1928 2 Sheets-Sheet 2 Patented Dec. 9, 1930 UNITED STATES PATENT OFFICE I BERNARDUSLEBUINUS MARIA vAN nER LANDE AND eERRI'r KOMEN, QFUDEVENTER, V

NETHERLANDS n a APPARATUS FOR PREPARING CASTING MoLns j Application filed March 26, 1928, Serial No. 264,918, and in a. NetherlandsjAugust fl'i' 192?.

This invention relates to a method and apparatus for preparing molds .for castlng products of variouskinds, more especlally flywheels.

WVith the use of sandslinger or other machines serving for the preparing of molds in the casting industry the objection is often experienced that the removal of the sand supply device very greatly fatigues the operator serving the machine and that the frequent adjustments of that supply devlce over the molding boxes or such like requlres much time.

The object of the invention is to entirely eliminate this objection and to obtain the great advantage that from 1 to times larger molding boxes or similar devlces are capable of being filled than with the sandslinger or similar machines that are used without the device, which forms the subject of this invention, whilst to obtain the further advantage that the sand is dlstrlbuted much more evenly in the mold boxes, since this influences the good finish of the castings. The accompanying drawings illustrate one constructional example of the device according to the invention, and in which Figure 1 is a part section and a part elevation of the entire device. 0 Figure 2 shows a detail in half section.

Figure 3 is a reverse plan view of said detail. The device forming the subject of the in vention consists of a pedestal 1 in which bear- 1 ing balls 3 are inserted in the raceway 2, so

that the upper-structure of the device resting upon these balls can be turned as required.

The circular bedplate 4 which therefore rests with the central boss 5 and the corresponding raceway 6 upon the balls 3 is rotatable. Attached to the'bedplate' l by bolts 8 are a number of supports 7 and these are replaceable by other supports of various lengths. These supports 7 may be attached in any number and be placed anywhere upon the plate 1, and they carry on their upper ends by means of the bolts 9 a pattern plate 10.

In the accompanying drawings, the molding plate has a peculiar construction which is hereinafter described. As a matter of'fact, however, every and an mold plate can be used upon the supports 1 i The mold-plate of which the accompanying drawings illustrate an example of the use of The pattern plate 10 which forms the bot- 5 tom of the. mold-box 21-iscombined with a hollow; annular casing 11 beneath it, and at certain distances in such hollow casing openings 12 are left. The centre part of the plate 10 carries a-s'eries of molding members 13 corresponding to the spokes of the Iflywheel to be cast The hollow annular member 11 is adapted for the, reception of an; adjustable ring-14 thatformsadie for forming one half of the mold, the ring 14 in thiscase forming one half of'the flywheel rimandbeing-adjustaibl'e so that rims ofdiiferent widthmay bemade r t The adjusting of this ring is effected with the aid of the wirespindle 15 resting upon 3 the pivot 18 in 'the pedestal 16, this latter being fixed with bolts to the round bedplate4.

' By rotating thespindle15 by meansof the hand spokes 17' which may, for instance, be replaced by a' handwheel' attached by means ot a pin to the spindle,tl ie nut '19 on the upper I end of the spindleis movedupwards or downwards as desired. Spokes20- attached to the V nut :eXtend radially through the "openings 12 e;

of the annulus 11 and are attached tothe adjustable ring 14, as is clearly shown'in Fig ure 2. A Themoldingoperationis as follows: After the ring 14- has been'adjusted with the aid of the hand-operated device 17 to the half of the breadth which isdesired for the width of the rim the mold box 21 which may be any shape is placed upon table 10, the sand-pouring device of the sandslinger or similar machine 703 is then arranged above the mold box. The machine is now rotated in any suitable way so that the mold box and pattern plate revolve relatively to the'sand-supplying means and while the sand is being fed into the mold box. The operator serving the machine may thus remain in his place and only need adjust the sand supply device over one line andonly once from the centre to the edge of the mold box, owing to which, with a definite length of the sand outflow device of the sandslinger or similar machine, much larger articles can be molded while, in addition, work can be performed much more quickly.

It is clear that the adjustable arrangement given by way of example in the accompanying drawings -and numbered 1715--19 2O1 l need not always be introduced upon rotating table (4), that adjustable arrangement can also beconstructed upon a fixed foundation. Itmay also be usedfor other castings than exclusively for flywheels.

. By the above described method and machine fine and-sharp castings are obtained which are absolutelythe vequivalent of each other, a thing that is extremely desirable for production en m'asse.

Having now described our invention, what we claim as new and desireto secure by Letters Patent is 1. A molding apparatus for the purpose described comprising in combination a pattern plate, a molding box carried thereon, a pattern block carried on a stem concentric with the pattern block, a turntable supporting the pattern plate, molding box and central stem, means forrotating the turntable, and means for rotating the centre stem to adjust the pattern block relatively to the pattern plate to vary the depth of the mold. V

1 2. Molding apparatus as claimed in claim 1, in which vone part of the pattern plate comprises a hollow annular casing depending therefrom, and the other part is an annular rib engaging said hollow casing and adjustably carried on a centre stem.

Molding apparatusfor the purpose described comprising in combination a pattern, plate, a molding box carried thereon, a pattern block carried ona stem concentric with the pattern block, a fixed centering member supporting the pattern plate, molding box and central stem, and means for rotating the centre stem to adjust the pattern block relatively to the pattern plate to vary'the depth of. the mold. s 1

In testimony whereof we have signed our names to this specification.

f B. L. M. VAN DER LANDE. G. KOMEN. 

